Maintenance; Changing Procedure To Bottom Feed And The Adjustment (For Lh-3528 Only) - JUKI LH-3500 Series Instruction Manual

6. MAINTENANCE

6-1. Changing procedure to bottom feed and the adjustment (for LH-3528 only)

WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
5
4
1
8
Needle
C
B
A
3
1
2
6
7
Fig. a
!3
!0
!2
!1
9
Fig. b
9
!0
!2
!1
!3
) Loosen hnge screw 1 after adjustng the
feed dal to the mnmum, move needle bar
rockng rod 2 from needle bar rockng rod
arm 3 to needle rocking rod fixing base 4 ,
and fix it with hinge screw 1 .
When hinge screw 1 is difficult to turn,
perform the work after removing oil tank
6 .
2) After replacng the feed dog and the throat
plate wth the components for bottom feed,
adjust the position of needle rocking rod fixing
base 4 so that the needle center algns wth
needle holes 7 n throat plate 8 , and fix
setscrews 5 .
Then replace the presser foot wth that for
bottom feed as well.
3) Loosen setscrews 9 and !3 (2 places) n
sprocket !2 . Loosen the setscrews n the
order of !3 and 9 . At ths tme, remove screw
No.  9 whch s put n screw hole A n
sprocket !2 , and put t n screw hole C whch
is located on the opposite side at 180˚. (Fig. a)
Turn the pulley by 180˚ without turning the
hook driving shaft, align the flat section of
the hook drvng shaft wth screw hole C n
sprocket !2 , and fix with setscrews 9 . Screw
No.  !1 n the hook drvng shaft rear bearng
!0 aligns with the flat section of the hook
drvng shaft. Make the state as the standard.
(Fg. b)
Then fix screw No. 2 !3 whch s put n screw
hole B n sprocket !2 as well.
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